JPH0634823Y2 - Concrete crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a concrete crusher for crushing a concrete structure, particularly a wall of a concrete building.

[Conventional technology]

As a means for destroying a concrete structure, a crushing claw type concrete crusher (1) as shown in FIG. 5 has been developed.

This concrete crusher (1) has less noise than blasting by using explosives, crushing by using rock drills using air pressure, crushing by hitting large steel balls, etc. It has the advantage of.

This concrete crusher (1) has an arm (5) at the tip of a boom (4) which is supported by an upper revolving structure (3) mounted on a claw-type lower traveling structure (2) of a traveling structure A so as to be able to move up and down. ) Is used by connecting to. The traveling body A corresponds to the structure of the claw type shovel excavator excluding the bucket. This conventional concrete crusher (1)
A disc-shaped head (10) whose posture is controlled by the action of hydraulic cylinders (6) and (7) and links (8) and (9) that drive the arm (5) [see FIGS. 6 (a) and (b)] ], A rotary table (11) that is rotatable about the axis of the disk-shaped head (10), and a pair of pins (12) (13) mounted in parallel in the horizontal direction on both lower sides of the rotary table. ) Rotatably supported by a pair of crushing claws (14) (15), and a pair of pins (16) mounted on both sides of the base of the rotary base (11) in parallel with each other in the horizontal direction.
a) (16b) is swingably attached, and its rod tip is connected to the shoulder parts (14a) (15a) of the crushing claws (14) (15) by a pin-connected hydraulic cylinder (17) (18). , A pair of protective covers (19) (20) for covering the moving range of the hydraulic cylinders (17) (18) that expand and contract while swinging from the outside,
By operating the hydraulic cylinders (17) (18), the crushing claws (14) (1
5) Open the lower space, and with this open claw (14) (15),
As shown in FIG. 5, the concrete wall (21) is sandwiched, and the concrete pressure of the claws (14) (15) is increased by the hydraulic cylinders (17) (18) to successively crush the concrete wall (21). It is a moving device.

The concrete crusher (1) enables noise-free and vibration-free concrete destruction work.

By the way, in this concrete crusher (1), the turntable (11) is rotatably attached to the disk-shaped head (10) because the concrete crusher (1) diagonally moves the concrete wall (21). Since the tip surfaces (14b) (15b) of the crush claws (14) (15) and the concrete wall (21) are not parallel when sandwiched, the force of the hydraulic cylinders (17) (18) causes the crush claws (14) (15). The twisting force that is generated when the tip surfaces (14b) and (15b) of (1) are brought into close contact with the concrete wall surface does not bend or destroy weak parts such as pins connecting concrete crushers, arms, booms, etc. This is to prevent it. As described above, if the rotary base (11) is rotatably attached to the disk-shaped head (10), the tip surfaces (14b) (15b) of the crushing claws (14) (15) respond to this twisting force. The turntable (11) rotates so that the model follows the concrete wall surface. As a result, work can be performed without the trouble of facing the traveling body A at a right angle to the concrete wall (21),
Workability is greatly improved.

Also, the protective covers (19) (20) are hydraulic cylinders (17).
Part of the concrete wall crushed during work or an obstacle in the work site hits the rods (17a) (18a) by bending, damaging, or covering the rods (17a) (18a) of (18) from the outside. Prevents dirt from attaching. If the rods (17a) and (18a) are bent without the protective covers (19) and (20), they will not be able to expand and contract, and if there is damage, oil will leak, and if dirt is attached, it will mix into the hydraulic system and deteriorate its function. Problems such as occur.

[Problems to be solved by the device]

The protective covers (19) (20) are the hydraulic cylinders (17).
Although essential for maintaining the function of (18), the conventional protective covers (19) and (20) cover the entire moving range of the hydraulic cylinder that expands and contracts while swinging on both sides of the concrete crusher. However, the shape was large and heavy because it was covered from the outside.

For this reason, the overall shape of the concrete crusher (1) becomes large, making it difficult to work particularly in a narrow space. Also, since the weight of the concrete crusher (1) increases, the moving operation during crushing work and transportation to the work site There was a problem that handling such as work became difficult.

Therefore, an object of the present invention is to provide a hydraulic cylinder protection structure that is smaller and lighter than conventional ones.

[Means for Solving the Problems]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has a disk-shaped head connected to an arm attached to the tip of a boom on a traveling body and a disk-shaped head connected concentrically with the disk-shaped head around the axis of the disk-shaped head. A rotating table that can be freely rotated, a pair of crushing claws that are swingably supported by pins on both sides of the rotating table and mesh with each other on the axis of the disk-shaped head, and a crushing claw that is pinned on both sides of the upper part of the rotating table. And a pair of hydraulic cylinders that are swingably supported in the same direction and whose rod tips are pin-coupled to the shoulder portion of the crushing claw, and the other end of the link whose one end is pin-coupled to the intermediate portion of the rotary table, and the crusher. A concrete crusher provided with a pair of protective covers, which are supported at two points by a pin on a shoulder portion of a claw and cover a rod of a hydraulic cylinder from the outside, having a U-shaped cross section.

[Action]

The concrete crusher operates a hydraulic cylinder and expands and contracts the rod to open and close the crushing claws to crush the concrete wall by crushing.

When the rod of the hydraulic cylinder expands or contracts, the protective cover is supported at two points by the shoulder portion of the crushing claw and the link, and extends from the tip of the rod toward the base of the hydraulic cylinder so as to be along the swinging hydraulic cylinder. Cover a fixed length.
This prevents the rod from being hit by external obstacles, fragments of concrete walls, and the like.

This protective cover need only be large enough to cover the rod part of the hydraulic cylinder, so it can be made compact and lightweight, and the size and weight of the concrete crusher can be made smaller than before.
Makes crushing work easier.

〔Example〕

 One embodiment of the present invention will be described.

Concrete crusher (30) shown in Fig. 1 (a) and (b)
Is used by being attached to an arm (5) attached to the tip of a boom (4) on a traveling body A shown in FIG. 5, similarly to the conventional concrete crusher (1). This concrete crusher (30) differs from the conventional concrete crusher (1) only in the structure of the protective cover.

In the concrete crusher (30) shown in FIGS. 1 (a) and (b), (31) is a disk-shaped head, and an arm (5) attached to the tip of the boom (4) of the traveling body A and a link (9). Is pin-coupled to. (32) is a turntable, and a disk-shaped head (31)
And is concentrically connected to the disk-shaped head (31) so that the disk-shaped head (31) can freely rotate about the axis. A swing brake mechanism (33) is provided between the disk-shaped head (31) and the turntable (32) so that the swing brake mechanism (33) rotates only when a certain force or more acts.

Reference numerals (34) and (35) are a pair of crushing claws, which are swingably supported by horizontally oriented pins (36) (37) provided on both sides of the lower part of the rotary table (32) so as to be swingable. Mesh on the axis of. (38) (39) are a pair of hydraulic cylinders,
On both sides of the upper part of 2), the pins (36) (3
Pins (42) provided at the shoulders of the crushing claws (34) (35), which are swingably supported by pins (40) (41) provided in parallel with 7) and have the tips of their rods (38a) (39a). ) (43).

(44) and (45) are a pair of protective covers whose sides are V-shaped and whose cross section is U-shaped as shown in an enlarged view in FIG.
One end is connected to the middle part of 2) with a pin (57), and the other ends of the links (46) (47) are extended two by two on both sides, and the shoulder parts (34a) (35a) of the crushing claws. Supported by two points.

The mounting state of the protective covers (44) (45) will be described in more detail with reference to the sectional view of FIG. FIG. 3 is a cross-sectional view showing a state in which the peripheral portion of one (45) of the protective covers (44) (45) having the same mounting structure is cut along the line ABCD in FIG. Then, insert the hydraulic cylinder (3) into the pin (43) inserted through the through hole provided in the shoulder (35a) of the crushing claw (35).
The tip of the rod (39a) in 9) is fitted. (48)
(49) is a cap that closes the through hole of the shoulder part (35a) of the crushing claw from both sides. On the outside of this cap (48) (49), there is a circular recess (48a) (49a) concentric with the pin (43). ) Has been formed. The stepped cylinders (50) and (51) are fitted and fixed to the protective cover (45) at the left and right symmetrical positions of the tip end.
0) (51) to the circular recesses (48a) (49a) on both sides of the cap.
a) Pins (52) (5
3) Pass the circular recesses (48a) (49) through the stepped cylinders (50) (51).
It is attached by fitting it to a) and fixing it with screws (48) and (49).

The protection cover (45) and the link (47) shown in FIGS. 4 (a) and 4 (b) are connected by a through hole (47) at one end of the link (47).
Fit a male threaded pin (54) with a flange in a),
This is performed by tightening and fixing the male screw pin (54) in the through holes (55) provided on both sides of the rear portion of the protective cover (45) with the nut (56).

The concrete crusher (30) of the present invention assembled as described above is operated by a pair of hydraulic cylinders (38) (39) to crush the claws (34) as shown in FIGS. 1 (a) and (b).
Open and close (35) to crush the concrete wall.

[Effect of device]

During the crushing work, the protective covers (44) (45) moved following the rods (38a) (39a) of the expanding and contracting hydraulic cylinders (38) (39), and the obstacles and crushes around the work site were crushed. Prevent concrete pieces from hitting the rods (38a) (39a) of the hydraulic cylinder. As a result, the rods (38a) (39a) are prevented from being bent, scratched, and attached with dirt, and the function of the hydraulic cylinder is maintained.

In particular, the protective covers (44) (45) of the present invention need only be large enough to cover the rods (38a) (39a) of the hydraulic cylinders (38) (39), so they can be made small and lightweight, and the concrete crusher (30 ) Can be smaller and lighter than conventional ones.

Therefore, crushing work can be performed even in a narrow place, and the moving operation of the concrete crushing machine (30) is easy, and the work efficiency can be remarkably improved.

[Brief description of drawings]

1 (a) and (b) are front views of the concrete crusher of the present invention, in which (a) is a state in which the crushing claw is closed, (b)
Indicates the state where the crushing claw is opened. 2 is a front view of the protective cover, FIG. 3 is a cross-sectional view showing the mounting state of the protective cover taken along the line ABCD in FIG. 2, and FIG. 4A.
(B) is a front view and a plan view of the link. FIG. 5 is a front view showing a state in which a conventional concrete crusher is attached to the work vehicle, and FIGS. 6 (a) and 6 (b) are front views of the conventional concrete crusher, in which (a) shows a crushing claw. The closed state, (b) shows the state in which the crushing claw is opened. (30) …… Concrete crusher, (31) …… Disc head, (32) …… Rotating table, (34) (35) …… Crushing claw, (36) (37) …… Pin, (38) (39) …… hydraulic cylinder, (38a) (39a) …… rod, (40) (41) …… pin, (42) (43) …… pin, (44) (45) …… protective cover, ( 46) (47) …… link, (52) (53) (54) …… pin.

Claims (1)

[Scope of utility model registration request] 1. A disk-shaped head connected to an arm attached to a tip of a boom on a traveling body, and concentrically connected to the disk-shaped head so that the disk-shaped head can freely rotate about its axis. The rotating table, a pair of crushing claws that are swingably supported by pins on both sides of the rotating table and mesh with each other on the axis of the disk-shaped head, and the pins on both upper sides of the rotating table swing in the same direction as the crushing claws. A pair of hydraulic cylinders that are freely supported and whose rod ends are pin-connected to the shoulders of the crushing claws, and the other end of the link whose one end is pin-connected to the intermediate part of the rotary table and the shoulders of the crushing claws. A concrete crusher, which is supported at two points by means of a pair of protective covers having a U-shaped cross section for covering the rod of the hydraulic cylinder from the outside.